发明授权
- 专利标题： Digital watermark embedding apparatus and digital watermark detecting apparatus
- 专利标题（中）： 数字水印嵌入装置和数字水印检测装置
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申请号： US12403030申请日： 2009-03-12
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公开(公告)号： US08270037B2公开(公告)日： 2012-09-18
- 发明人: Kensuke Kuraki , Shohei Nakagata , Hideaki Ishii , Motoo Masui , Taizo Anan
- 申请人： Kensuke Kuraki , Shohei Nakagata , Hideaki Ishii , Motoo Masui , Taizo Anan
- 申请人地址： JP Kawasaki
- 专利权人： Fujitsu Limited
- 当前专利权人： Fujitsu Limited
- 当前专利权人地址： JP Kawasaki
- 代理机构： Staas & Halsey LLP
- 主分类号： H04N1/40
- IPC分类号： H04N1/40
摘要：
A plurality of background texture patterns each of which includes a region not having a dot and having a feature different from those of the other background texture patterns, are combined, and information is embedded in a background region of a document image. Then, a mathematical-morphology-based conversion is performed on the document image, and thereby a feature of a region not having a dot in each of the background texture patterns is extracted in order to identify the embedded information.
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